Recently purchased extremely well documented 1986 red C4 with saddle leather interior w/Sports seats. Driver's side was shot just from everyday use, but passenger side not too bad. Purchased ($425 shipped) "leather like" perforated covers from Corvette Worldwide Parts and had them installed locally ($75 per seat). Results were great!!! Certainly changed the look of the car from "ok, it's an old car" to "Wow; looks great for an old car".